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Cross non woven fabric/ Cambrella Fabric
Non-woven fabric shrinkage test
by：Sunshine
2021-04-06
1) Shrinkage rate test
After non-woven fabrics are immersed in water at room temperature or washed and dried, the degree of dimensional shrinkage that occurs in both vertical and horizontal directions is called shrinkage. Generally, the fabric will shrink to a certain extent if it falls into the water or after washing, especially the thin non-woven fusible interlining, if the shrinkage rate is too large, it will affect the performance.
There are two types of tests for shrinkage: the dipping method and the washing machine method. The dipping method is static, and the washing machine method is dynamic. The impregnation method is commonly used when testing non-woven fabrics. Before the test, cut three specimens with a size of 250mmx2s0mm, and use a pen to draw a 200m×200m and center orthogonal marking line on the specimens to mark the vertical and horizontal directions. Subsequently, the sample was humidity-conditioned for 24 hours under standard atmospheric conditions, and then the length of the three marked lines of the sample was measured longitudinally and transversely to the accuracy of 0.5 mm.
During the test, immerse the sample in water at a temperature of 25℃2℃, take it out after immersing for 20 minutes, place it on the platform, and let it dry naturally. The sample can also be immersed in a 0.5% neutral soap solution at a temperature of 50°C and 1°C (bath ratio is 1:50), and then taken out after being soaked for 20 minutes, and rinsed for 20 minutes at a temperature of 50°C ± 1° Take it out and place it on the platform to dry naturally. Then, after 24 hours of humidity control, the length of the three marked lines in the longitudinal and transverse directions of the sample is measured, which is also accurate to 0.5 mm. Calculate as follows:
Shrinkage rateu003d(L-L')/L*100%
After non-woven fabrics are immersed in water at room temperature or washed and dried, the degree of dimensional shrinkage that occurs in both vertical and horizontal directions is called shrinkage. Generally, the fabric will shrink to a certain extent if it falls into the water or after washing, especially the thin non-woven fusible interlining, if the shrinkage rate is too large, it will affect the performance.
There are two types of tests for shrinkage: the dipping method and the washing machine method. The dipping method is static, and the washing machine method is dynamic. The impregnation method is commonly used when testing non-woven fabrics. Before the test, cut three specimens with a size of 250mmx2s0mm, and use a pen to draw a 200m×200m and center orthogonal marking line on the specimens to mark the vertical and horizontal directions. Subsequently, the sample was humidity-conditioned for 24 hours under standard atmospheric conditions, and then the length of the three marked lines of the sample was measured longitudinally and transversely to the accuracy of 0.5 mm.
During the test, immerse the sample in water at a temperature of 25℃2℃, take it out after immersing for 20 minutes, place it on the platform, and let it dry naturally. The sample can also be immersed in a 0.5% neutral soap solution at a temperature of 50°C and 1°C (bath ratio is 1:50), and then taken out after being soaked for 20 minutes, and rinsed for 20 minutes at a temperature of 50°C ± 1° Take it out and place it on the platform to dry naturally. Then, after 24 hours of humidity control, the length of the three marked lines in the longitudinal and transverse directions of the sample is measured, which is also accurate to 0.5 mm. Calculate as follows:
Shrinkage rateu003d(L-L')/L*100%
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